Customer bandwidth re-distribution in point-to-multipoint access

1. A system for redistributing bandwidth among a plurality of customer premises equipments (CPEs) that are configured to operate in an initial bandwidth allocation, the system comprising: a first CPE of the plurality of CPEs configured to operate in a first initial set of tones based on the initial bandwidth allocation; a second CPE of the plurality of CPEs configured to operate in a second initial set of tones based on the initial bandwidth allocation; a distribution point unit (DPU), coupled to the first CPE and the second CPE via a single or multiple lines, respectively, as a point to multi-point access wherein the DPU is configured to: determine an excess available bandwidth condition of the first CPE; determine an insufficient available bandwidth condition of the second CPE; determine a bandwidth re-allocation based on the excess available bandwidth condition of the first CPE and the insufficient available bandwidth condition of the second CPE; and communicate, to the first CPE and the second CPE, a bandwidth re-allocation request and a plurality of granted tones to dynamically generate the bandwidth re-allocation among the first CPE and the second CPE from the initial bandwidth allocation.

2. The system of claim 1 , wherein the DPU is further configured to: communicate a time instant at which the plurality of granted tones is switched from the first CPE to the second CPE.

3. The system of claim 1 , wherein the DPU is further configured to: perform a channel pre-estimation by transmitting a probe signal that comprises tones utilized by the plurality of CPEs; enable the plurality of CPEs to compute one or more error signals based on the probe signal; and receive the one or more error signals from the plurality of CPEs on received signals on direct channels associated with the plurality of CPEs, respectively, and one or more error signals from a crosstalk channel associated with the received signals.

4. The system of claim 1 , wherein the DPU is further configured to: determine the plurality of granted tones for the bandwidth re-allocation based on computed indications from the plurality of CPEs.

5. The system of claim 1 , wherein the second CPE is further configured to compute bit loadings on tones re-allocated from the first CPE in response to the bandwidth re-allocation request and the plurality of granted tones, wherein the insufficient bandwidth condition is based on a downstream data rate corresponding to a service request.

6. The system of claim 1 , wherein, in response to the bandwidth re-allocation comprises a downstream direction, the first CPE is further configured to synchronize operation on first granted tone of the plurality of granted tones, and the second CPE is further configured to synchronize operation on second granted tone of the plurality of granted tones, and wherein the second CPE is further configured to perform an on-line reconfiguration (OLR) to optimize a precoding and a bit loading operation.

7. The system of claim 1 , wherein the second CPE is further configured to mitigate near-end cross talk (NEXT) in response to communicating in a partial duplex operation from one or more other lines connected to another CPE of the plurality CPEs in a twisted pair or a cable line, and cancel echo on granted tones in response to communicating in a full duplex operation.

8. The system of claim 1 , wherein the DPU is further configured to: generate a downstream bandwidth re-distribution of downstream tones from the first initial set of tones and the second initial set of tones based on a first change in one or more criteria, the one or more criteria comprising: a computed error indication, a measured signal attenuation, the excess available bandwidth condition of the first CPE, the insufficient available bandwidth condition of the second CPE, or a downstream data rate of the first CPE or the second CPE; and generate an upstream bandwidth re-distribution of upstream tones that is different from and independent of the downstream bandwidth re-distribution based on a second change in the one or more criteria further comprising an upstream data rate.

9. The system of claim 1 , wherein, in response to the bandwidth re-allocation comprising an upstream direction, the DPU is further configured to indicate a bit loading and a gain setting corresponding to a granted tone of the plurality of granted tones being re-allocated from the first CPE to the second CPE.

10. The system of claim 1 , wherein the DPU is further configured to: decrease an amount of time for channel estimation during the bandwidth re-allocation at the second CPE by increasing a number of positions to transmit probe symbols that indicate the plurality of granted tones being utilized by the plurality of CPEs in a line of a twisted pair or a cable line to the second CPE, while transmitting a quiet symbol or a probe symbol at the positions on another line of the twisted pair or the cable line to the first CPE or to other CPEs.

11. The system of claim 1 , wherein the DPU is further configured to: decrease an amount of time for channel estimation during the bandwidth re-allocation by performing the channel estimation and a precoder update for the plurality of granted tones after the bandwidth re-allocation is completed with the first CPE and the second CPE.

12. An apparatus employed in a Distribution Point Unit (DPU) device comprising: a DPU processor comprising a memory and coupled to a plurality of customer premise equipments (CPEs) via a point-to-multipoint connection that operate on an initial frequency allocation, respectively; and a data interface as a point to multi-point access including an external port configured to connect the DPU processor via lines to the plurality of CPEs at a same premises and configured to communicate data corresponding to a frequency re-allocation from a first CPE of the plurality of CPEs to one or more second CPEs of the plurality of CPEs; wherein the DPU processor is configured to: determine available bandwidth from among the plurality of CPEs; generate an estimation of whether an additional bandwidth is anticipated by the one or more second CPEs; and in response to the available bandwidth and the estimation, generating the frequency re-allocation dynamically from the first CPE to the one or more second CPEs by communicating granted tones that differ from the initial frequency allocation to the plurality of CPEs and communicating a bandwidth re-allocation request that instructs the first CPE to relinquish the available bandwidth and the one or more second CPEs to operate on the available bandwidth of the first CPE with the granted tones based on the frequency re-allocation.

13. The apparatus of claim 12 , wherein the frequency re-allocation comprises a subset of carrier frequencies of the initial frequency allocation that the first CPE operated on, an indication to the first CPE to no longer operate on the subset of carrier frequencies, and another indication of an assignment to the one or more second CPEs to begin operating on the subset of carrier frequencies.

14. The apparatus of claim 12 , wherein the DPU processor is further configured to provide a time instant to the first CPE and the one or more second CPEs that triggers the frequency re-allocation communicating a frame count, a superframe count, or another time count that is synchronized between one or more DPU receivers of the DPU device and receivers of the plurality of CPEs in a synchronization operation.

15. The apparatus of claim 14 , wherein the DPU processor is further configured to: modify a power spectral density of the granted tones to control the synchronization operation of the one or more second CPEs before a completion of the frequency re-allocation by computing a channel matrix that cancels crosstalk between the lines on the granted tones to the one or more second CPEs and providing via the time instant an indication of a first time for the one or more second CPEs to receives one or more probe symbols on the granted tones while the first CPE receives one or more data symbols on the granted tones, and a second time that is different from the first time that the one or more second CPEs receive both the one or more probe symbols and the one or more data symbols on the granted tones.

16. The apparatus of claim 12 , wherein the DPU processor is further configured to: receive one or more bit loadings from the one or more second CPEs on the granted tones re-allocated from the first CPE, in response to the frequency re-allocation corresponding to a downstream operation; and provide the one or more bit loadings to the one or more second CPEs, in response to the frequency re-allocation corresponding to an upstream operation.

17. The apparatus of claim 12 , wherein the DPU processor is further configured to: decrease an amount of power on lines of the one or more second CPEs during a transition time to reduce a bit loading on the lines of the one or more second CPEs, and then restoring the amount of power on the lines of the one or more second CPEs after the frequency re-allocation is completed.

18. The apparatus of claim 12 , wherein the DPU processor is further configured to: in response to one or more CPEs operating in a full duplex communication mode: enable a transmission of probe symbols only on the granted tones in a upstream direction during the frequency re-allocation and transmission of both data symbols and probe symbols on the granted tones after the frequency re-allocation; or enable the transmission of probe symbols on one or more data symbol positions during a reduced channel estimation or a transition period during the frequency re-allocation when transmission is stopped or only the transmission of probe symbols is enabled in the full duplex communication mode.

19. The apparatus of claim 12 , wherein the DPU processor is further configured to: in response to one or more CPEs operating in a full duplex communication mode: estimate an upstream far-end crosstalk (FEXT) on the granted tones; estimate a near-end crosstalk (NEXT) between a third CPE of the plurality of CPEs, wherein NEXT for the third CPE is not canceled at the DPU device, based on a difference between a first estimated NEXT between the first CPE and the third CPE before the frequency re-allocation and a second estimated NEXT between a second CPE and the third CPE after the frequency re-allocation; and adjust upstream and downstream power spectral densities on second CPE lines to the one or more second CPEs based on an adjustment of a stored NEXT channel estimation from the estimated FEXT and the estimated NEXT.

20. A method for a distribution point unit (DPU) device to redistribute bandwidth among customer premises equipments (CPEs) coupled to the DPU device via twisted pair with different lines to the CPEs, respectively, and operating in an initial bandwidth allocation, the method comprising: determining, via a DPU processor coupled to the CPEs via a network interface as a point to multi-point access interface, an excess available bandwidth condition of a first CPE operating on a first set of tones of an initial bandwidth allocation and an insufficient available bandwidth condition of a second CPE operating on a second set of tones of the initial bandwidth allocation; determining, via the DPU processor, a bandwidth re-allocation based on the excess available bandwidth condition of the first CPE and the insufficient available bandwidth condition of the second CPE; and communicating, via the DPU processor coupled to the CPEs via the network interface device along the twisted pair, granted tones and a bandwidth re-allocation request to the first CPE and the second CPE to dynamically generate the bandwidth re-allocation among the first CPE and the second CPE from the initial bandwidth allocation.

21. The method of claim 20 , further comprising: communicating, via the DPU processor, a time instant at which the granted tones are switched from the first CPE to the second CPE.

22. The method of claim 20 , further comprising: performing, via the DPU processor, a channel pre-estimation by transmitting a probe signal comprising the granted tones, receiving a report on signal to noise ratio or power strength from the CPEs based on the probe signal for a direct channel and computed error signals from the CPEs based on a crosstalk channel associated with the probe signals; and generating, via the DPU processor, the channel pre-estimation based on the computed error signals and the report.

23. The method of claim 20 , further comprising: generating, via the DPU processor, a downstream bandwidth re-distribution of downstream tones from the first set of tones and the second set of tones based on a first change in one or more criteria, the one or more criteria comprising: a computed indication, a measured signal attenuation, the excess available bandwidth condition of the first CPE, the insufficient available bandwidth condition of the second CPE, or a downstream data rate of the first CPE or the second CPE; and generating, via the DPU processor, an upstream bandwidth re-distribution of upstream tones that is different from and independent of an upstream bandwidth re-distribution based on a second change in the one or more criteria further comprising an upstream data rate.

24. The method of claim 20 , further comprising: in response to the bandwidth re-allocation comprising an upstream direction, indicating, via the DPU processor, a bit loading and a gain setting corresponding to a granted tone of the first set of tones being re-allocated from the first CPE to the second CPE.

25. The method of claim 20 , further comprising: decreasing, via the DPU processor, an amount of time for channel estimation during the bandwidth re-allocation at the second CPE by increasing a number of positions to transmit probe symbols that indicate the granted tones to the second CPE, while transmitting a quiet symbol or a probe symbol at the positions on another line to the first CPE or to other CPEs.

26. The method of claim 20 , further comprising: in response to one or more CPEs operating in a full duplex communication mode: estimating an upstream far-end crosstalk (FEXT) on the granted tones; estimating a near-end crosstalk (NEXT) between a third CPE of the CPEs, wherein NEXT for the third CPE is not canceled at the DPU device, based on a different between a first estimated NEXT between the first CPE and the third CPE before the bandwidth re-allocation and a second estimated NEXT between the second CPE and the third CPE after the bandwidth re-allocation; and adjusting upstream and downstream power spectral densities on second CPE lines to the second CPE based on an adjustment of a stored NEXT channel estimation that is a function of the estimated FEXT and the estimated NEXT.